Improvement in steam-generators



@sind @hline .IAMESEATON, OF BRIDGEPORT, ILLINOIS.

Letters Patent No. 91,316, dated June 15, 1869.

rMPRovEt/rnNT IN STEAM-GENERATORS.

The Schedule referred to in these Letters Patent and making part of the same.

To all whom it may concern: K f

Be it known that I, J AMESAEATON, of Bridgeport, in thecounty of Lawrence, and State of Illinois, have invented a new and useful Improvement in Steam- Boilers; and I do hereby declare that the following is a full, clear, and exact rdescription thereof, which will enable others skilled in the art to make and use the same, reference being had to the accompanying drawings, forming part of this. specification.

Thisinvention. relates toimprovements in steamboilers, intended to provide boilers which maybe used for agricultural purposes, where they are required to pass over uneven ground without exposing the iiues or other parts to the Afire uncovered by water; also to provide a more safe and economical boiler than those now 1n use.

It consists in providing a steam-chamber within the shell of the boiler in a manner to be completely enveloped b'y thewater, and anl elevated water-chamber communicating with the waterspace, so arranged that the boiler maybe kept full of water at all/times, the water beingy maintained at such a height in the said elevated chamber that no change of position, suchas is likely to -occu'r tothe boiler, will causevany part of the fire-surface or steam-char'nherfto becomeuncovered', and provided with means forconveying the steam to the said chambera's will be hereinafter specified.

Figure 1 represents a longitudinal sectional elevation of a boiler, constructed upon 'the principle of my invention, and "1g Figure 2 represents a transverse sectionof the same. Similar letters of reference indicate corresponding parts. r' v f A represents the outer shell of a boiler, which may be of any preferred construction, and provided with the` usual supply` and blowing-oi pipes. g B represents the fire-box, and C the fines, which are here-represented as' terminating at therear end of the boiler. I prefer, however, tofhave them return, and

arrange the smoke-stack to encircle the elevated waterchamber, which will be hereinafter'explained.

D represents a steam-chamber, made of sheet-metal, and arranged within the shell of the boiler, and. preferably as large .as itmay be, allowing a slight water space between it and the outer shell.

E represents an elevated-water-chamber, rising up from the top of the boiler, preferably at the: front end, and provided with any suitable number of perforated dividing-plates F near the top, designed to prevent the water from splashing upward in the said chamber by the motion of the boiler, as 'on a traction-engine, or a locomotive.

AThe said chamber is also provided with water-gauge cocks G.

' H represents a vertical pipe, rising within the waterchamber to near the top, and open thereat, and communicating through a horizontal pipe, I, within the shell of the boiler, with the steam-chamber D.

A branching-pipe, K, having two or more connectionsvwith the rear end of the boiler, leads into the top of the water-chamber, to facilitate the escape of steam, as it is generated in the boiler, to the pipe H, for finding its way t the steam-chamber D.

A pipe, L, leads from the steam-chamber D, near the bottom thereof, to the exterior of the boiler, where it is provided with a water-cock, whereby the water kwhich may accumulate in the steam-chamber' by condensationor otherwise, may be drawn off'.

M represents another steam-pipe leading from the chamber D,through which the steam may be conveyed either to the safety-valve or to the engine, as may be preferred.

It will be observed that by this plan the boiler, being kept suicien'tly full to maintain a few gallons of water in the elevated chamber, no part of .the .boiler can be uncovered to the fire, which is a frequent cause of explosion, and consequent damage, to which boilers intended for traction-engines would be especially liable according to the common construction.

The chamber D may be made pf comparatively light and thin material, as the pressure will be equal or nearly equal externally and internally. It may serve also as a means-of strengthening the outer shell by staybolts suitably arranged, or stay-bolts from the ireplate may extend through it to the end of the boiler.. The fire-box may be made much larger by this plan, proportionably to the size of the boiler, owing to the fact that no steam-space is required to be reserved in the shell of the boiler.

It will be also observed that by this plan, because the steam cannot be brought into contact with overheated surfaces of iron, no gas, or at most but very little, can be generated, as now often happens; but if by any possibility/it should be produced, the reservoir D cannot become suiicientlyheated to cause ignition.

As a grcatermeasure of safety, however, I have arranged 'the steam-pipe M so as to take the steam from the bottom of the reservoir, whereby if any gas exist, which, being heavier than steam, and consequently falling to the bottom, it will be forced into the pipe, and thereby `carried oli.

Ido not desire to limit myself to any particular arrangement of boilers in applying the improvements herein described; but

Having thus described my invention,

I claim as new, and desire to secure by Letters Patent- 1. `The combination, with steam-boilers, of an elevated water-chamber and an internal steam-chamber, substantially as speciiied.

2. The combination, with the elevated water-chamber, of the perforated plates, substantially as specified.

3. The combination, with the water-chamber F and steam-chamber D, ofthe pipe H, substantially as speci` fied.

4. The combination, with the steam-boiler and the elevated water-chamber, of the steam-pipe K, substani tially as specified.

5. The combination,with a steam-chamber, D, en-

i i l i I 4 from, substantially as specified.

closed within the shell of the boiler of the pipe L,

substantially as specified.

6. The combination, with asteam-chamber adapted for deliveringr the steam from near the bottom of a. delivery-pipe, M, arranged for receiving the steam there- Witnesses P. F. LANTERMAN, E. D. TURNER.

JAMES EATON. 

